The 33-year-old actor - who previously admitted to being in a relationship with a non-famous lady - stepped out in Los Angeles at the weekend with Tasha McCauley, the co-founder and CEO of Fellow Robots, which is based at NASA Research Park in Silicon Valley, California, People reports.

Tasha - who speaks English, Arabic and Spanish - has previously taught students about "rapidly accelerating technologies" at Singularity University in Silicon Valley, the establishment where she studied for a graduate certificate in robotics, and also has an International Business Education and Research MBA from the University of Southern California.

Joseph previously admitted his girlfriend - who he met through mutual friends - wanted to stay out of the spotlight.

He said: "I have a girlfriend but I tend not to really like to talk about it in public.

"The girl that I'm with, she really doesn't want to be a part of that."

The 'Don Jon' star has also confessed in the past to having a "phobia" of "getting attention from girls for "being famous".